Efficient Catalysis of the Aerobic Baeyer-Villiger Oxidation over a Bifunctional Catalyst Based on Cobalt Tetraphenylporphyrin Intercalated into Zn2Al Hydrotalcite

On the basis of the mechanism of Baeyer-Villiger (B-V) oxidation, a bifunctional catalyst based on tetra(4-sulfonato-phenyl)porphinato-cobalt(II) anion (CoTSPP) intercalated into Zn2Al hydrotalcite (Zn2Al-LDH; LDH=layered double hydroxide) was designed and prepared. XRD, FTIR, DR UV/vis, TG/DTA, and SEM characterization indicate that CoTSPP molecular has been successfully intercalated into the layers of Zn2Al-LDH. The catalytic activity of the synthesized hybrid in the B-V oxidation for various ketones is excellent. Control experiments indicated that the catalyst has a bifunctional role in the reactions. The protocol opens up new perspectives in the rational design of efficient catalytic systems.